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WGBFAS 2009

WGBFAS 2009. HERRING IN SD 25-29+32 (excl. GOR). Update Assessment. WGBFAS 2009. HERRING IN SD 25-29+32 (excl. GOR). Catch Input Data Landings : 126 155 t in 2008 = +8% compared to 2007 Problem: misreporting of catches in mixed fisheries Discards: not regarded as a problem

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WGBFAS 2009

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  1. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) Update Assessment

  2. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) Catch Input Data Landings: 126 155 t in 2008 = +8% compared to 2007 Problem: misreporting of catches in mixed fisheries Discards: not regarded as a problem CANUM: By country, SD and quarter; Quality of biological data: Sampling frequency/1000 t: 3.9 samples/516 fish meas./220 fish aged

  3. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) Catch Input Data WECA = WEST: Given by country, SD and quarter; Subsequently combined to give weight at age for the whole catch MATPROP: Constant throughout time series NATMOR: 2008: Average of 2001-2005 data from SGMAB 2006 2009: M from regression of M vs SSB cod 25-32

  4. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) Tuning Fleet: International Acoustic Survey / 1991-2007 data revised by WGBIFS. 1993, 1995 & 1997 excluded due to incomplete area coverage 2000 excluded due to potential data errors

  5. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) XSA SPALY Run: LOG CATCHABILITY RESIDUALS

  6. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) Stock Summary

  7. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR)

  8. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) XSA Final Run Retrospective Analysis

  9. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) Comparison with previous assessment

  10. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR)

  11. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR)

  12. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR)

  13. WGBFAS 2009 HERRING IN SD 25-29+32 (excl. GOR) • Quality of Assessment: • There is uncertainty associated with the total catches due to misreporting between herring and sprat catches.These uncertainties could influence the estimates of absolute stock size and fishing mortality. • Advice on Management: • Fishing mortality less than Fpa (0.19) ~ 103.000 t

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